Datasheet

PDTC143X_SER All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 11 — 9 December 2011 6 of 17
NXP Semiconductors
PDTC143X series
NPN resistor-equipped transistors; R1 = 4.7 k, R2 = 10 k
FR4 PCB, standard footprint
Fig 4. Transient thermal impedance from junction to ambient as a function of pulse duration for
PDTC143XT (SOT23); typical values
FR4 PCB, standard footprint
Fig 5. Transient thermal impedance from junction to ambient as a function of pulse duration for
PDTC143XU (SOT323); typical values
006aac779
10
-5
1010
-2
10
-4
10
2
10
-1
t
p
(s)
10
-3
10
3
1
10
2
10
10
3
Z
th(j-a)
(K/W)
1
duty cycle = 1
0.75
0.5
0.33
0.2
0.1
0.05
0.02
0.01
0
006aac780
10
-5
1010
-2
10
-4
10
2
10
-1
t
p
(s)
10
-3
10
3
1
10
2
10
10
3
Zth(j-a)
(K/W)
1
duty cycle = 1
0.75
0.5
0.33
0.2
0.1
0.05
0.02
0.01
0